BAEL-3326, "Optimizing JSON Schema for production use":
Added domain classes and JUnit tests.
This commit is contained in:
parent
0bb1851089
commit
a7dc3199ad
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@ -45,6 +45,11 @@
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<artifactId>jackson-databind</artifactId>
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<version>${jackson.version}</version>
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</dependency>
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<dependency>
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<groupId>com.fasterxml.jackson.core</groupId>
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<artifactId>jackson-annotations</artifactId>
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<version>${jackson.version}</version>
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</dependency>
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<dependency>
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<groupId>javax.json.bind</groupId>
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<artifactId>javax.json.bind-api</artifactId>
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package com.baeldung.jsonoptimization;
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import java.io.FileInputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.util.Objects;
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import com.fasterxml.jackson.databind.ObjectMapper;
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public class Customer {
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private long id;
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private String firstName;
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private String lastName;
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private String street;
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private String postalCode;
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private String city;
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private String state;
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private String phoneNumber;
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private String email;
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public long getId() {
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return id;
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}
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public void setId(long id) {
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this.id = id;
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}
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public String getFirstName() {
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return firstName;
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}
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public void setFirstName(String firstName) {
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this.firstName = firstName;
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}
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public String getLastName() {
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return lastName;
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}
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public void setLastName(String lastName) {
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this.lastName = lastName;
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}
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public String getStreet() {
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return street;
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}
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public void setStreet(String street) {
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this.street = street;
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}
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public String getPostalCode() {
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return postalCode;
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}
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public void setPostalCode(String postalCode) {
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this.postalCode = postalCode;
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}
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public String getCity() {
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return city;
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}
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public void setCity(String city) {
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this.city = city;
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}
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public String getState() {
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return state;
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}
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public void setState(String state) {
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this.state = state;
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}
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public String getPhoneNumber() {
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return phoneNumber;
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}
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public void setPhoneNumber(String phoneNumber) {
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this.phoneNumber = phoneNumber;
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}
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public String getEmail() {
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return email;
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}
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public void setEmail(String email) {
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this.email = email;
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}
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@Override
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public int hashCode() {
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return Objects.hash(city, email, firstName, id, lastName, phoneNumber, postalCode, state, street);
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}
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@Override
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public boolean equals(Object obj) {
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if (this == obj) {
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return true;
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}
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if (!(obj instanceof Customer)) {
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return false;
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}
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Customer other = (Customer) obj;
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return Objects.equals(city, other.city) && Objects.equals(email, other.email) && Objects.equals(firstName, other.firstName) && id == other.id && Objects.equals(lastName, other.lastName) && Objects.equals(phoneNumber, other.phoneNumber)
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&& Objects.equals(postalCode, other.postalCode) && Objects.equals(state, other.state) && Objects.equals(street, other.street);
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}
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@Override
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public String toString() {
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return "Customer [id=" + id + ", firstName=" + firstName + ", lastName=" + lastName + ", street=" + street + ", postalCode=" + postalCode + ", city=" + city + ", state=" + state + ", phoneNumber=" + phoneNumber + ", email=" + email + "]";
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}
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public static Customer[] fromMockFile() throws IOException {
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ObjectMapper objectMapper = new ObjectMapper();
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InputStream jsonFile = new FileInputStream("src/test/resources/json_optimization_mock_data.json");
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Customer[] feedback = objectMapper.readValue(jsonFile, Customer[].class);
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return feedback;
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}
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}
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package com.baeldung.jsonoptimization;
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import java.io.IOException;
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import com.fasterxml.jackson.core.JsonGenerator;
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import com.fasterxml.jackson.core.JsonParser;
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import com.fasterxml.jackson.core.ObjectCodec;
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import com.fasterxml.jackson.databind.DeserializationContext;
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import com.fasterxml.jackson.databind.JsonNode;
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import com.fasterxml.jackson.databind.SerializerProvider;
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import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
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import com.fasterxml.jackson.databind.ser.std.StdSerializer;
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public class CustomerDeserializer extends StdDeserializer<Customer> {
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private static final long serialVersionUID = 1L;
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public CustomerDeserializer() {
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this(null);
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}
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public CustomerDeserializer(Class<Customer> t) {
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super(t);
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}
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@Override
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public Customer deserialize(JsonParser parser, DeserializationContext deserializer) throws IOException {
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Customer feedback = new Customer();
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ObjectCodec codec = parser.getCodec();
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JsonNode node = codec.readTree(parser);
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feedback.setId(node.get(0).asLong());
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feedback.setFirstName(node.get(1).asText());
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feedback.setLastName(node.get(2).asText());
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feedback.setStreet(node.get(3).asText());
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feedback.setPostalCode(node.get(4).asText());
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feedback.setCity(node.get(5).asText());
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feedback.setState(node.get(6).asText());
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JsonNode phoneNumber = node.get(7);
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feedback.setPhoneNumber(phoneNumber.isNull() ? null : phoneNumber.asText());
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JsonNode email = node.get(8);
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feedback.setEmail(email.isNull() ? null : email.asText());
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return feedback;
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}
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}
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package com.baeldung.jsonoptimization;
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import com.fasterxml.jackson.annotation.JsonInclude;
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@JsonInclude(JsonInclude.Include.NON_NULL)
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public class CustomerNoNull extends Customer {
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@Override
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public String toString() {
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return "CustomerNoNull [toString()=" + super.toString() + "]";
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}
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public static CustomerNoNull[] fromCustomers(Customer[] customers) {
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CustomerNoNull[] feedback = new CustomerNoNull[customers.length];
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for(int i = 0; i < customers.length; i++) {
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Customer aCustomer = customers[i];
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CustomerNoNull newOne = new CustomerNoNull();
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newOne.setId(aCustomer.getId());
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newOne.setFirstName(aCustomer.getFirstName());
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newOne.setLastName(aCustomer.getLastName());
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newOne.setStreet(aCustomer.getStreet());
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newOne.setCity(aCustomer.getCity());
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newOne.setPostalCode(aCustomer.getPostalCode());
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newOne.setState(aCustomer.getState());
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newOne.setPhoneNumber(aCustomer.getPhoneNumber());
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newOne.setEmail(aCustomer.getEmail());
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feedback[i] = newOne;
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}
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return feedback;
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}
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}
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package com.baeldung.jsonoptimization;
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import java.io.IOException;
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import com.fasterxml.jackson.core.JsonGenerator;
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import com.fasterxml.jackson.databind.SerializerProvider;
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import com.fasterxml.jackson.databind.ser.std.StdSerializer;
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public class CustomerSerializer extends StdSerializer<Customer> {
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private static final long serialVersionUID = 1L;
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public CustomerSerializer() {
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this(null);
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}
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public CustomerSerializer(Class<Customer> t) {
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super(t);
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}
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@Override
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public void serialize(Customer customer, JsonGenerator jsonGenerator, SerializerProvider serializer) throws IOException {
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jsonGenerator.writeStartArray();
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jsonGenerator.writeNumber(customer.getId());
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jsonGenerator.writeString(customer.getFirstName());
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jsonGenerator.writeString(customer.getLastName());
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jsonGenerator.writeString(customer.getStreet());
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jsonGenerator.writeString(customer.getPostalCode());
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jsonGenerator.writeString(customer.getCity());
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jsonGenerator.writeString(customer.getState());
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jsonGenerator.writeString(customer.getPhoneNumber());
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jsonGenerator.writeString(customer.getEmail());
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jsonGenerator.writeEndArray();
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}
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}
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package com.baeldung.jsonoptimization;
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import java.util.Objects;
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import com.fasterxml.jackson.annotation.JsonGetter;
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import com.fasterxml.jackson.annotation.JsonInclude;
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import com.fasterxml.jackson.annotation.JsonProperty;
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public class CustomerShortNames {
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private long id;
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@JsonProperty("f")
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private String firstName;
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@JsonProperty("l")
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private String lastName;
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@JsonProperty("s")
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private String street;
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@JsonProperty("p")
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private String postalCode;
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@JsonProperty("c")
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private String city;
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@JsonProperty("a")
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private String state;
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@JsonProperty("o")
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private String phoneNumber;
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@JsonProperty("e")
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private String email;
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public long getId() {
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return id;
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}
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public void setId(long id) {
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this.id = id;
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}
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public String getFirstName() {
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return firstName;
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}
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public void setFirstName(String firstName) {
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this.firstName = firstName;
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}
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public String getLastName() {
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return lastName;
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}
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public void setLastName(String lastName) {
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this.lastName = lastName;
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}
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public String getStreet() {
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return street;
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}
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public void setStreet(String street) {
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this.street = street;
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}
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public String getPostalCode() {
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return postalCode;
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}
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public void setPostalCode(String postalCode) {
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this.postalCode = postalCode;
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}
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public String getCity() {
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return city;
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}
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public void setCity(String city) {
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this.city = city;
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}
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public String getState() {
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return state;
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}
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public void setState(String state) {
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this.state = state;
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}
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public String getPhoneNumber() {
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return phoneNumber;
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}
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public void setPhoneNumber(String phoneNumber) {
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this.phoneNumber = phoneNumber;
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}
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public String getEmail() {
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return email;
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}
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public void setEmail(String email) {
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this.email = email;
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}
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@Override
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public int hashCode() {
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return Objects.hash(city, email, firstName, id, lastName, phoneNumber, postalCode, state, street);
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}
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@Override
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public boolean equals(Object obj) {
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if (this == obj) {
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return true;
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}
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if (!(obj instanceof CustomerShortNames)) {
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return false;
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}
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CustomerShortNames other = (CustomerShortNames) obj;
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return Objects.equals(city, other.city) && Objects.equals(email, other.email) && Objects.equals(firstName, other.firstName) && id == other.id && Objects.equals(lastName, other.lastName) && Objects.equals(phoneNumber, other.phoneNumber)
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&& Objects.equals(postalCode, other.postalCode) && Objects.equals(state, other.state) && Objects.equals(street, other.street);
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}
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@Override
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public String toString() {
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return "CustomerWithShorterAttributes [id=" + id + ", firstName=" + firstName + ", lastName=" + lastName + ", street=" + street + ", postalCode=" + postalCode + ", city=" + city + ", state=" + state + ", phoneNumber=" + phoneNumber + ", email=" + email
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+ "]";
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}
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public static CustomerShortNames[] fromCustomers(Customer[] customers) {
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CustomerShortNames[] feedback = new CustomerShortNames[customers.length];
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for(int i = 0; i < customers.length; i++) {
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Customer aCustomer = customers[i];
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CustomerShortNames newOne = new CustomerShortNames();
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newOne.setId(aCustomer.getId());
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newOne.setFirstName(aCustomer.getFirstName());
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newOne.setLastName(aCustomer.getLastName());
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newOne.setStreet(aCustomer.getStreet());
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newOne.setCity(aCustomer.getCity());
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newOne.setPostalCode(aCustomer.getPostalCode());
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newOne.setState(aCustomer.getState());
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newOne.setPhoneNumber(aCustomer.getPhoneNumber());
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newOne.setEmail(aCustomer.getEmail());
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feedback[i] = newOne;
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}
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return feedback;
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}
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}
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package com.baeldung.jsonoptimization;
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import com.fasterxml.jackson.annotation.JsonInclude;
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import com.fasterxml.jackson.annotation.JsonProperty;
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@JsonInclude(JsonInclude.Include.NON_NULL)
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public class CustomerShortNamesNoNull extends CustomerShortNames {
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@Override
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public String toString() {
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return "CustomerShortNamesNoNull [toString()=" + super.toString() + "]";
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}
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public static CustomerShortNamesNoNull[] fromCustomers(Customer[] customers) {
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CustomerShortNamesNoNull[] feedback = new CustomerShortNamesNoNull[customers.length];
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for(int i = 0; i < customers.length; i++) {
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Customer aCustomer = customers[i];
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CustomerShortNamesNoNull newOne = new CustomerShortNamesNoNull();
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newOne.setId(aCustomer.getId());
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newOne.setFirstName(aCustomer.getFirstName());
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newOne.setLastName(aCustomer.getLastName());
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newOne.setStreet(aCustomer.getStreet());
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newOne.setCity(aCustomer.getCity());
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newOne.setPostalCode(aCustomer.getPostalCode());
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newOne.setState(aCustomer.getState());
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newOne.setPhoneNumber(aCustomer.getPhoneNumber());
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newOne.setEmail(aCustomer.getEmail());
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feedback[i] = newOne;
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}
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return feedback;
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}
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}
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package com.baeldung.jsonoptimization;
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import java.util.Objects;
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public class CustomerSlim {
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private long id;
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private String name;
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private String address;
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public long getId() {
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return id;
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}
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public void setId(long id) {
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this.id = id;
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}
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public String getName() {
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return name;
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}
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public void setName(String name) {
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this.name = name;
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}
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public String getAddress() {
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return address;
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}
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public void setAddress(String address) {
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this.address = address;
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}
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@Override
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public int hashCode() {
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return Objects.hash(address, id, name);
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}
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@Override
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public boolean equals(Object obj) {
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if (this == obj) {
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return true;
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}
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if (!(obj instanceof CustomerSlim)) {
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return false;
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}
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CustomerSlim other = (CustomerSlim) obj;
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return Objects.equals(address, other.address) && id == other.id && Objects.equals(name, other.name);
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}
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@Override
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public String toString() {
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return "CustomerSlim [id=" + id + ", name=" + name + ", address=" + address + "]";
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}
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public static CustomerSlim[] fromCustomers(Customer[] customers) {
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CustomerSlim[] feedback = new CustomerSlim[customers.length];
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for(int i = 0; i < customers.length; i++) {
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Customer aCustomer = customers[i];
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CustomerSlim newOne = new CustomerSlim();
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newOne.setId(aCustomer.getId());
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newOne.setName(aCustomer.getFirstName() + " " + aCustomer.getLastName());
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newOne.setAddress(aCustomer.getStreet() + ", " + aCustomer.getCity() + " " + aCustomer.getState() + " " + aCustomer.getPostalCode());
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feedback[i] = newOne;
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}
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return feedback;
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}
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}
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package com.baeldung.jsonoptimization;
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import static org.junit.Assert.assertArrayEquals;
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import static org.junit.jupiter.api.Assertions.assertEquals;
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import static org.junit.jupiter.api.Assertions.assertTrue;
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import java.io.ByteArrayOutputStream;
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import java.io.File;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.text.DecimalFormat;
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import java.util.zip.GZIPOutputStream;
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import org.junit.jupiter.api.BeforeAll;
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import org.junit.jupiter.api.BeforeEach;
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import org.junit.jupiter.api.Test;
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import com.fasterxml.jackson.core.JsonProcessingException;
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import com.fasterxml.jackson.core.Version;
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import com.fasterxml.jackson.databind.ObjectMapper;
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import com.fasterxml.jackson.databind.ObjectWriter;
|
||||
import com.fasterxml.jackson.databind.module.SimpleModule;
|
||||
|
||||
class JsonOptimizationUnitTest {
|
||||
private static final String TEST_LABEL_DEFAULT_JSON = "Default JSON";
|
||||
private static final String TEST_LABEL_DEFAULT_JSON_NO_NULL = "Default JSON without null";
|
||||
private static final String TEST_LABEL_SHORTER_ATTRIBUTE_NAMES = "Shorter Attribute Names";
|
||||
private static final String TEST_LABEL_SHORTER_ATTRIBUTE_NAMES_NO_NULL = "Shorter Attribute Names without null";
|
||||
private static final String TEST_LABEL_CUSTOM_SERIALIZER = "Custom Serializer";
|
||||
private static final String TEST_LABEL_SLIM_CUSTOMER = "Slim customer";
|
||||
private static DecimalFormat LENGTH_FORMATTER = new DecimalFormat("###,###,###");
|
||||
private static Customer[] customers;
|
||||
private ObjectMapper mapper;
|
||||
|
||||
@BeforeAll
|
||||
static void setUpOnce() throws Exception {
|
||||
customers = Customer.fromMockFile();
|
||||
}
|
||||
|
||||
@BeforeEach
|
||||
void setUp() {
|
||||
mapper = new ObjectMapper();
|
||||
}
|
||||
|
||||
@Test
|
||||
void testSetUp() {
|
||||
assertEquals(1000, customers.length, "There should be a 1000 customers");
|
||||
}
|
||||
|
||||
@Test
|
||||
void testDefaultJson() throws IOException {
|
||||
printBanner(TEST_LABEL_DEFAULT_JSON);
|
||||
byte[] plainJson = createPlainJson(TEST_LABEL_DEFAULT_JSON, customers);
|
||||
compressJson(TEST_LABEL_DEFAULT_JSON, plainJson);
|
||||
}
|
||||
|
||||
@Test
|
||||
void testDefaultNoNull() throws IOException {
|
||||
printBanner(TEST_LABEL_DEFAULT_JSON_NO_NULL);
|
||||
CustomerNoNull[] defaultNoNull = CustomerNoNull.fromCustomers(customers);
|
||||
byte[] plainJson = createPlainJson(TEST_LABEL_DEFAULT_JSON_NO_NULL, defaultNoNull);
|
||||
compressJson(TEST_LABEL_DEFAULT_JSON_NO_NULL, plainJson);
|
||||
}
|
||||
|
||||
@Test
|
||||
void testShorterAttributes() throws IOException {
|
||||
printBanner(TEST_LABEL_SHORTER_ATTRIBUTE_NAMES);
|
||||
CustomerShortNames[] shorterOnes = CustomerShortNames.fromCustomers(customers);
|
||||
byte[] shorterJson = createPlainJson(TEST_LABEL_SHORTER_ATTRIBUTE_NAMES, shorterOnes);
|
||||
compressJson(TEST_LABEL_SHORTER_ATTRIBUTE_NAMES, shorterJson);
|
||||
}
|
||||
|
||||
@Test
|
||||
void testShorterAttributesNoNull() throws IOException {
|
||||
printBanner(TEST_LABEL_SHORTER_ATTRIBUTE_NAMES_NO_NULL);
|
||||
CustomerShortNamesNoNull[] shorterOnesNoNull = CustomerShortNamesNoNull.fromCustomers(customers);
|
||||
byte[] shorterJson = createPlainJson(TEST_LABEL_SHORTER_ATTRIBUTE_NAMES_NO_NULL, shorterOnesNoNull);
|
||||
compressJson(TEST_LABEL_SHORTER_ATTRIBUTE_NAMES_NO_NULL, shorterJson);
|
||||
}
|
||||
|
||||
@Test
|
||||
void testSlim() throws IOException {
|
||||
printBanner(TEST_LABEL_SLIM_CUSTOMER);
|
||||
CustomerSlim[] slimOnes = CustomerSlim.fromCustomers(customers);
|
||||
byte[] slimJson = createPlainJson(TEST_LABEL_SLIM_CUSTOMER, slimOnes);
|
||||
compressJson(TEST_LABEL_SLIM_CUSTOMER, slimJson);
|
||||
}
|
||||
|
||||
@Test
|
||||
void testCustomSerializer() throws IOException {
|
||||
printBanner(TEST_LABEL_CUSTOM_SERIALIZER);
|
||||
|
||||
SimpleModule serializer = new SimpleModule("CustomCustomerSerializer", new Version(1, 0, 0, null, null, null));
|
||||
serializer.addSerializer(Customer.class, new CustomerSerializer());
|
||||
mapper.registerModule(serializer);
|
||||
|
||||
SimpleModule deserializer = new SimpleModule("CustomCustomerDeserializer", new Version(1, 0, 0, null, null, null));
|
||||
deserializer.addDeserializer(Customer.class, new CustomerDeserializer());
|
||||
mapper.registerModule(deserializer);
|
||||
|
||||
byte[] plainJson = createPlainJson(TEST_LABEL_CUSTOM_SERIALIZER, customers);
|
||||
compressJson(TEST_LABEL_CUSTOM_SERIALIZER, plainJson);
|
||||
}
|
||||
|
||||
private void printBanner(String name) {
|
||||
System.out.println();
|
||||
System.out.println("************************************************");
|
||||
System.out.println("Testing " + name);
|
||||
System.out.println();
|
||||
}
|
||||
|
||||
void compressJson(String label, byte[] plainJson) throws IOException {
|
||||
ByteArrayOutputStream outpuStream = new ByteArrayOutputStream();
|
||||
GZIPOutputStream gzipStream = new GZIPOutputStream(outpuStream);
|
||||
gzipStream.write(plainJson);
|
||||
gzipStream.close();
|
||||
byte[] gzippedJson = outpuStream.toByteArray();
|
||||
System.out.println(label + " GZIPped length: " + LENGTH_FORMATTER.format(gzippedJson.length));
|
||||
assertTrue(plainJson.length > gzippedJson.length, label + " should be longer than GZIPped data");
|
||||
}
|
||||
|
||||
private byte[] createPlainJson(String label, Object[] customers) throws IOException {
|
||||
System.out.println(label + " sample: ");
|
||||
ObjectWriter prettyWritter = mapper.writerWithDefaultPrettyPrinter();
|
||||
System.out.println(prettyWritter.writeValueAsString(customers[0]));
|
||||
|
||||
byte[] feedback = mapper.writeValueAsBytes(customers);
|
||||
System.out.println(label + " length: " + LENGTH_FORMATTER.format(feedback.length));
|
||||
assertTrue(feedback.length > 1, label + " should be there");
|
||||
|
||||
String prefix = label.replaceAll(" ", "-")
|
||||
.toLowerCase();
|
||||
File tempFile = File.createTempFile("jon-optimization-" + prefix, ".json");
|
||||
FileOutputStream fos = new FileOutputStream(tempFile);
|
||||
fos.write(feedback);
|
||||
fos.close();
|
||||
System.out.println(label + " file: " + tempFile.toString());
|
||||
|
||||
Object[] restoredOnes = mapper.readValue(feedback, customers.getClass());
|
||||
assertArrayEquals(TEST_LABEL_DEFAULT_JSON + ": restoring from JSON should work", customers, restoredOnes);
|
||||
|
||||
return feedback;
|
||||
}
|
||||
|
||||
}
|
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Reference in New Issue